content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * -----------------------
   * KeyToGroupMapTests.java
   * -----------------------
   * (C) Copyright 2004-2008, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 29-Apr-2004 : Version 1 (DG);
   *
   */
  
  package org.jfree.data;
  
  import org.junit.Test;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInput;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutput;
  import java.io.ObjectOutputStream;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotSame;
  import static org.junit.Assert.assertSame;
  import static org.junit.Assert.fail;
  
  /**
   * Tests for the {@link KeyToGroupMap} class.
   */
  public class KeyToGroupMapTest  {
  
  
  
  
  
      /**
       * Tests the mapKeyToGroup() method.
       */
      @Test
      public void testMapKeyToGroup() {
          KeyToGroupMap m1 = new KeyToGroupMap("G1");
  
          // map a key to the default group
          m1.mapKeyToGroup("K1", "G1");
          assertEquals("G1", m1.getGroup("K1"));
  
          // map a key to a new group
          m1.mapKeyToGroup("K2", "G2");
          assertEquals("G2", m1.getGroup("K2"));
  
          // clear a mapping
          m1.mapKeyToGroup("K2", null);
          assertEquals("G1", m1.getGroup("K2"));  // after clearing, reverts to
                                                  // default group
  
          // check handling of null key
          try {
              m1.mapKeyToGroup(null, "G1");
              fail("Should have thrown IllegalArgumentException on null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'key' argument.", e.getMessage());
          }
      }
  
      /**
       * Tests that the getGroupCount() method returns the correct values under
       * various circumstances.
       */
      @Test
      public void testGroupCount() {
          KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
  
          // a new map always has 1 group (the default group)
          assertEquals(1, m1.getGroupCount());
  
          // if the default group is not mapped to, it should still count towards
          // the group count...
          m1.mapKeyToGroup("C1", "G1");
          assertEquals(2, m1.getGroupCount());
  
          // now when the default group is mapped to, it shouldn't increase the
          // group count...
          m1.mapKeyToGroup("C2", "Default Group");
          assertEquals(2, m1.getGroupCount());
  
          // complicate things a little...
          m1.mapKeyToGroup("C3", "Default Group");
          m1.mapKeyToGroup("C4", "G2");
          m1.mapKeyToGroup("C5", "G2");
          m1.mapKeyToGroup("C6", "Default Group");
          assertEquals(3, m1.getGroupCount());
  
          // now overwrite group "G2"...
          m1.mapKeyToGroup("C4", "G1");
          m1.mapKeyToGroup("C5", "G1");
          assertEquals(2, m1.getGroupCount());
      }
  
      /**
       * Tests that the getKeyCount() method returns the correct values under
       * various circumstances.
       */
      @Test
      public void testKeyCount() {
          KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
  
          // a new map always has 1 group (the default group)
          assertEquals(0, m1.getKeyCount("Default Group"));
  
          // simple case
          m1.mapKeyToGroup("K1", "G1");
          assertEquals(1, m1.getKeyCount("G1"));
          m1.mapKeyToGroup("K1", null);
          assertEquals(0, m1.getKeyCount("G1"));
  
          // if there is an explicit mapping to the default group, it is counted
          m1.mapKeyToGroup("K2", "Default Group");
          assertEquals(1, m1.getKeyCount("Default Group"));
  
          // complicate things a little...
          m1.mapKeyToGroup("K3", "Default Group");
          m1.mapKeyToGroup("K4", "G2");
          m1.mapKeyToGroup("K5", "G2");
          m1.mapKeyToGroup("K6", "Default Group");
          assertEquals(3, m1.getKeyCount("Default Group"));
          assertEquals(2, m1.getKeyCount("G2"));
  
          // now overwrite group "G2"...
          m1.mapKeyToGroup("K4", "G1");
          m1.mapKeyToGroup("K5", "G1");
          assertEquals(2, m1.getKeyCount("G1"));
          assertEquals(0, m1.getKeyCount("G2"));
      }
  
      /**
       * Tests the getGroupIndex() method.
       */
      @Test
      public void testGetGroupIndex() {
          KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
  
          // the default group is always at index 0
          assertEquals(0, m1.getGroupIndex("Default Group"));
  
          // a non-existent group should return -1
          assertEquals(-1, m1.getGroupIndex("G3"));
  
          // indices are assigned in the order that groups are originally mapped
          m1.mapKeyToGroup("K3", "G3");
          m1.mapKeyToGroup("K1", "G1");
          m1.mapKeyToGroup("K2", "G2");
          assertEquals(1, m1.getGroupIndex("G3"));
          assertEquals(2, m1.getGroupIndex("G1"));
          assertEquals(3, m1.getGroupIndex("G2"));
      }
  
      /**
       * Tests the getGroup() method.
       */
      @Test
      public void testGetGroup() {
          KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
  
          // a key that hasn't been mapped should return the default group
          assertEquals("Default Group", m1.getGroup("K1"));
  
          m1.mapKeyToGroup("K1", "G1");
          assertEquals("G1", m1.getGroup("K1"));
          m1.mapKeyToGroup("K1", "G2");
          assertEquals("G2", m1.getGroup("K1"));
          m1.mapKeyToGroup("K1", null);
          assertEquals("Default Group", m1.getGroup("K1"));
  
          // a null argument should throw an exception
          try {
              m1.getGroup(null);
              fail("Should have thrown IllegalArgumentException on null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'key' argument.", e.getMessage());
          }
      }
  
      /**
       * Confirm that the equals method can distinguish all the required fields.
       */
      @Test
      public void testEquals() {
          KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
          KeyToGroupMap m2 = new KeyToGroupMap("Default Group");
          assertEquals(m1, m2);
          assertEquals(m2, m1);
  
          m1.mapKeyToGroup("K1", "G1");
          assertFalse(m1.equals(m2));
          m2.mapKeyToGroup("K1", "G1");
          assertEquals(m1, m2);
      }
  
      /**
       * Confirm that cloning works.
       */
      @Test
      public void testCloning() throws CloneNotSupportedException {
          KeyToGroupMap m1 = new KeyToGroupMap("Test");
          m1.mapKeyToGroup("K1", "G1");
          KeyToGroupMap m2 = (KeyToGroupMap) m1.clone();
          assertNotSame(m1, m2);
          assertSame(m1.getClass(), m2.getClass());
          assertEquals(m1, m2);
  
          // a small check for independence
          m1.mapKeyToGroup("K1", "G2");
          assertFalse(m1.equals(m2));
          m2.mapKeyToGroup("K1", "G2");
          assertEquals(m1, m2);
      }
  
      /**
       * Serialize an instance, restore it, and check for equality.
       */
      @Test
      public void testSerialization() throws IOException, ClassNotFoundException {
  
          KeyToGroupMap m1 = new KeyToGroupMap("Test");
  
              ByteArrayOutputStream buffer = new ByteArrayOutputStream();
              ObjectOutput out = new ObjectOutputStream(buffer);
              out.writeObject(m1);
              out.close();
  
              ObjectInput in = new ObjectInputStream(
                  new ByteArrayInputStream(buffer.toByteArray())
              );
          KeyToGroupMap m2 = (KeyToGroupMap) in.readObject();
              in.close();
  
          assertEquals(m1, m2);
  
      }
  
  }
  